Improvement in drop-hammer lifters



@teint Sietse anni @dat FRANCIS M.A HOGE, OF SHELBURNEFA'LLS, MASSACHUSETTS.

Letters Patent No. 110,655, dated January 3, 1871 antedated December24, 1870.

IMPROVEMENT IN DROP-HAMMER LIFT'ERS.v

The Schedule referred to in these Letters Patient and making part of the sameA To all whom it 'may concern:

Be it known that Llinnncrs M. HODGE, of Shelburne Falls, in the county of Franklin and State of Massachusetts, have invented a new and improved Drop-Hammer Lifter; and I do hereby declare that the following is a full, clear, and exact descriptionthereof, which will .enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specication.

This invention relates to hammers operated by steam or air,-and consists in certain combinations and arrangements of mechanism for lifting and holding the hammer, which will be irst described in connection with all that is neeessaryto an understanding thereof, and will then be speciiied in the claim.

Figures 1 and 2 are, respectively, a front and side view ot' the lifter.

Figures 3 and 4 are sectional views through the lines :e x and z z of tig. 1.

In iig. 3-

A represents the frame ot' the drop-hammer;

B, the lifting-drum; and

C, the belt, having one end fastened thereto, while the other is attached directly or indirectly to the hammer.

ll represents the steam-cylinder; and F, a partition therein, to Vcompel the steam to actuate in one direction only.

Itis an annular collar, fast upon the lifting-shaft,l

and carrying the same with it in its motion. l

G isa projecting flange or wing risingfi'omthe collar H, and fitting steamtight between said collar and Fig. 2 gives a view ofthe valve-gear and themeans by which it is operated.

I is the valve-chest, of which the lower part receives the steam through K, and conveys it through a port 011 the opposite side into the cylinder, while the upper port exhausts steam therefrom throughL and the opposite outlet in tlic cylinder'.

T is a valve-rod, by whose movement-s these ports are opened and closed, and

S S arc pieces att-ached thereto, by which it is reciprocatcd.

Q is a slidingr circular plate, having a vertical stud, R, which Y alternately moves rod T in opposite directions, and a lateral projection, lt', by which it is itself vilu'uted.

l\[ is a disk fast ou the lifting-shaft, and provided with two tappets, N N, which act alternately against thc projections 1t to more the rotary slide 0b.

ln iig. 3 is shown the device by which the hammer is held up untilthe operatoris ready for it to fall.

a represents a circular ange fast on the side of lifting-wheel B 5 The hammer being at its highest point of elevation, its gravity tends to bring it down but, in rotating the .lifting-wheel B, a sucient friction is produced by the contact of the s aid wheel and Z to cause the latter to turn and draw the strap b tight about the auge a,

and completely arrest any further rotation of B. The

hammer is thus held until the treadle i's operated to 'loosen the belt b.

The mode of operation of the lifting apparatus is as follows:

The hammer being down,and the port Kopen,

- steam is received through the latter, and conveyed through apertures opposite, which lead into cylinder E, betweenthe partition F and the wing This, acting againstsaid wing, carries it around iii thecylinder until the stud Rglifts the valve-rod T. This closes the port K and opens the exhaust L, which connect'swith an loutlet in the cylinder that has been passed by the wing G. The steam now ceasing to act, the weight of the hammer would reverse the direction of the lift-wheel and shaft, and would immediately fall if they were not held by the friction device. i

Having thus described all that is necessary to a I clear understanding of my invention,

What I esteem to be new, and desire to protect by 1. The 'rotary engine; herein described,and drum E, arranged on the same shaft, combined with the hammer-strap O, as and for the purpose described.

' 2. The combination of friction-roll l, drumB, pendent arm K, strap d, belt c, bandr l, (on flan ge a,) and lever g, all relatively arranged as and for the purpose described.

3. The disk M having tappets N N, and the sliding circular plate Q having stud R and lateral projection Rthereon, combined with the valve-rod S S l, all constructed and relatively arranged as and for the purpose specified.

The above specieation of my invention signed by me this 2d day ot' March, 1870.

FRANCIS M. HODGE. Witnesses: I

Gno. W. MABEE, ALnX.'-F. ROBERTS. 

